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Lower Carboniferous sponges from the Craven Reef Belt of North Yorkshire

J. Keith Rigby and D. J. C. Mundy
Lower Carboniferous sponges from the Craven Reef Belt of North Yorkshire
Proceedings of the Yorkshire Geological Society (November 2000) 53, Part 2: 119-128


Fossil sponges are significant elements in framework facies of Late Visean Cracoean reefs of northern England. In the Craven Reef Belt (North Yorkshire), lithistid demosponges, including Scheiia castletonense (Wolfenden 1959), Haplistion carbonaria (Wolfenden 1959) and Haplistion mega sp. nov., occur along with the less abundant, sphinctozoid demosponge Sollasia ramosa sp. nov. in this facies. Scheiia castletonense is an irregular globose to mound-shaped tricranocladinid hindiid sponge with irregular secondary branchlike growths in which the canal and skeletal structure are continuous with those of the globular part of the sponge. Both species of Haplistion are rhizomorinid lithistid sponges. Haplistion mega is a lobate sponge characterized by moderately coarse skeletal tracts that are relatively far apart, in contrast to the fine tracts and closer spacing in the more common globose to subspherical Haplistion carbonaria. The aporate "sphinctozoan" Sollasia ramosa, commonly appears in the available sections as isolated spherical chambers because of its relatively loose branching habit and the beadlike to moniliform series of spherical chambers in each branch.

ISSN: 0044-0604
EISSN: 2041-4811
Serial Title: Proceedings of the Yorkshire Geological Society
Serial Volume: 53, Part 2
Title: Lower Carboniferous sponges from the Craven Reef Belt of North Yorkshire
Affiliation: Brigham Yound University, Department of Geology, Provo, UT, United States
Pages: 119-128
Published: 200011
Text Language: English
Publisher: Yorkshire Geological Society, Leeds, United Kingdom
References: 31
Accession Number: 2004-061490
Categories: Invertebrate paleontology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. geol. sketch map, strat. col.
N53°37'00" - N54°34'00", W02°34'00" - W00°12'00"
Secondary Affiliation: Talisman Energy, CAN, Canada
Country of Publication: United Kingdom
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute.
Update Code: 200418
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